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Group: Forum Members
Last Active: 14 Years Ago
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G'day All,
I have a 272 fitted to a ski boat that has become my project and seek some knowledge as it'smy first v8. She was bought last Sep after being neglected in a rear yard for 7 years and she definately appeared that way when picked up. The owner stated that the motor was sound and was not the reason he stopped using her but we have all heard that before.
I had the motor out to clean up and fix the hull, but did not pull it right down due to funds available, only removed the manifolds and rocker covers and turned it over with the starter only after a good lube and made sure all moved as it should with all valves etc moving as they should. All of the oil was removed and changed with a new filter fitted and no pieces of metal were found in the sump. I have had her running in the front yard with no worries at all, idling away happily and some sharp revs to piss off the whinging neighbours.
I dropped her in a River today for a last check as I planned to go to a dam for her first trip this weekend.
After a few minutes it all went very bad!! She started to make a metal on metal clanging noise from the block (like hitting it with a hammer). The strange thing was it was sporatic. Like bang....bang..............bangbang.........bang..................bang if you get my drift. It wasn't a constant bang like with every stroke. It seemed louder through the intake when the air cleaner was removed. The motor continued to idle away happily and she was not missing or anything. One side of the exhaust appeared to be a bit steamier than the other if that helps, as the water is dumped into the exhaust just after the manifold to be blown out the back. The oil pressure gauge was reading a steady 70psi with no fluctuations at all.
My dad was with me and he is very mechanical and thinks she may have thrown the top or part of a piston due to possibly being a bit rusty which was now getting knocked around the bore. Looks like I will be pulling the heads off for a look and see what I'm up for.
Any tips or advice is greatly appreciated as I have never worked on a y before now. Does anybody know where a good source of parts, eg pistons etc is as I might be needing them soon, preferably in australia but not necessary if the freight isn't too bad. From a quick look on the net 292 pistons seem cheaper and more readily available so has anybody bored out a 272 and used them instead? Does anybody know of some basic checks I can do while running to problem solve before I pull it down to narrow the problem?
Thanks for any replies.
Geoff the broken hearted ski boat owner!!
My first V8!!Brisbane, Australia!!
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